BMW X3 hesitation on acceleration
I have an X3 on order, should arrive any day !
When I test drove an X3 I noticed a hesitation from a standing stop.
The salesman said it was due to the cold and a cold engine.
However, I have noticed this topic on other forums:
http://bimmer.roadfly.com/bmw/forums/e83/8257513-1.html
Some have mentioned that a computer fix will take care of it. At any rate, I am leasing
a BMW, in part, for their reputation for preformance,handeling,etc.
I'm also a bit troubled about CR recent "below average" reliability rating.
Are there any current owners who can shed any light on this........I guess I'm having some buyers remorse before taking delivery !
When I test drove an X3 I noticed a hesitation from a standing stop.
The salesman said it was due to the cold and a cold engine.
However, I have noticed this topic on other forums:
http://bimmer.roadfly.com/bmw/forums/e83/8257513-1.html
Some have mentioned that a computer fix will take care of it. At any rate, I am leasing
a BMW, in part, for their reputation for preformance,handeling,etc.
I'm also a bit troubled about CR recent "below average" reliability rating.
Are there any current owners who can shed any light on this........I guess I'm having some buyers remorse before taking delivery !
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but a brand new BMW should be flawless. IMO, thats why they get the big bucks.
It's not my words.....
I've had my '05 X3 for about 18 months now and I know how it works. He's had his even longer.
Listen up here folks, here's the deal:
In DRIVE mode the trans software is programed to start off in second gear as an economy measure to help save gas. BMW did that on purpose. If you're fairly light on the throttle it will stay in Second, accelerate, and eventually shift into Third, Fourth and Fifth. Try it out and count the shifts. (You may need to watch the tach to notice the shifts, this trans can be really smooth at very light throttle and the higher gear shifts may only vary a few hundred rpm)
But if you put a little more foot into the throttle on take-off (i.e.: from a dead stop) the trans will shift down from Second to First to give you better acceleration. This is what it is suposed to do. It happens in an instant but you can still feel the car start to move, then "hesitate" from the shift, and then take off. If you have a light enough foot it may never even happen to you. If your foot is rather heavy you may notice it more at first but it will "teach" your trans really quick that you want a fast start most of the time.
Now in SPORT mode the trans ALWAYS starts in first, thus no "hesitation". The drawback to always using SPORT mode to avoid the "hesitation" (gear change) is that it almost NEVER shifts into Fifth gear in city driving. The vehicle has to reach a certain speed before it will upshift to Fifth. That can really hurt your mileage in town if you never get over 35-45 mph. AND your trans never gets a chance to "adapt" to your style in DRIVE mode.
The software that controls the transmission does "learn" your driving habits after some time. That's why they call it "Adaptive Transmission Control". The computer uses throttle position and vehicle speed to determine what gear to be in. It WILL adapt to your particular driving style but it takes a while. Maybe as long as 3-4 months depending on how much you drive it. I noticed that "hesitation" (trans shift to first) for quite a while in my X3. These days it never seems to happen. My trans has adapted
So guys and gals, give it some time. It will smooth out the more you drive your fantastic X3s as you and the X become ONE
Now I'm ready to take delivery of my X3 without any "hesitation" :-))
This board is terrific ! I hope to return the favor after I have been an owner for awhile.
It is living up to the BMW standard of driving for me in every way .... except for
the adaptive trany issue. Not only do I have the hesitation from standing stop, I am also experiencing it while ascending just about any grade of 25 degrees or more !
I can only describe it as though the car were out of tune or running out of gas.
I am noticing this more often as the days go by. This has to be something other than the adaptive transmission issue, can anyone relate to this ?
I plan I taking it to the dealership tomorrow.
I would be prepared to explain to the dealer if it does that in SD" mode, and/or if it depends on how deep into the gas you are. It sounds worse than ours, ours is only under really light throttle, and only barely noticable......
In regular D mode it is very deliberate and refined so to speak, in SD mode it becomes
a real tiger, almost like driving a BMW 3 series coupe. So far, my average mpg is about the same as using D, around 19.5 mpg in suburban driving.
Anyway the dealer still has our X3 and we have a nice loaner that we will not be returning until they fix our vehicle. We were told today that by the end of the month (april)BMW should have new software that will (hopefully)fix the problem. I would highly recommend that if you have this same hesitiation issue, you should return to your dealer. Good Luck YoScott
This problem has been addressed by BMW. Tell the dealer to refer to SIB 24-08-07. This includes a reprogram of the DME and the EGS.
Art
Let's avoid hyping your dealership please.
Good news for my 545i!
You press the gas, and nothing...it goes slowly, then jerks forward. Sure, it might go without hesitation if you "floor" it. This transmission controller works like a 16 year old girl learning "stick" for the first time. It is very jerky on upward and downward shifting.
Everyone makes remarks about it when in the car, like, "how much did you pay for this", and "I thought BMW was good".The other day, I was driving 40 miles an hour, then let off the accelerator, then it shot up to 6000 rpm's briefly, then back down. Never had a car do that before. I do not like this-every day it hesitates!! Okay-I concede that it is a little better. I think this is a temporary software "patch", but not the ultimate fix.
My lowest rated consumer reports 10 year old jeep shifted WAY better.
Mine is going back in again for service!
Anyway-they better do something soon, because my car sucks! It is a very frustrating and rough ride.
Mine is going in for service the second time, and it is only 1 month old! The hesitation is worst than ever now. From a dead stop, and while driving, and cornering, the hesitation and rough downshifting is making me think that BMW is the ultimate piece of crap driving machine!
If you like to floor it, drive it in the sports mode. It will Start in Gear 1 and launch quickly. It will not get into the 6 the gear. You will burn more fuel but the car will feel like a rocket.
If you driving on city roads and are concerned about the mileage, drive in the regular mode. However, if you are in the regular mode, do not floor the pedal every time you start. Flooring it enables the kick down and the transmission shifts down.
The BMW inline 6 is a smooth engine with a wonderful torque-RPM curve. You do not need to floor it and rev up the engine to get the power. Drive off without flooring it and you will get smooth power delivery and reasonable acceleration for city driving. When you floor it in regular, the car downshifts which takes time (manifests has hesitation) and then launches (which feels like a strong jerk). Dont do it unless you have a traffic related reason to.
To truly enjoy the car, try the manual shifting mode. It shifts very quickly and you can control the experience very well. . The adaptive tranny might be worsening the problem since it anticipates that you are going to floor and downshifts sooner. However, I doubt that it is the root cause. If you are careful about the power you apply the car will work fine.
with this issue are just driving as we always have. When I hop in my wife's Acura, off I go without hesitation, same old method, not flooring it ! My X3 is at the dealer right now for
the SIB 24 08 07 software update on the tranny. I will let you know if it has helped.
One thing I realized that th gas pedal of BMWs offer a lot more resistance than other cars. For example, just today my wife commented that our 7 series requires a lot more effort on th gas pedal than an Accord V6 EX! This is because the gas pedal on the 7er has greater senstivity (i.e. shades of gas intensity) and a harder pedal allows for more precise control. This might also mean that if you are new to driving these cars, you might be putting in more effort than you realized simply because the car reacts differently to the pedal.
We all know how to drive! I am 42 and all of my previous cars where fine. And yes, one was a BMW. I do not think the accelerator pedal is any different than most cars.
The X3 has transmission problems-period.
It hesitates from a dead stop, and also while going if you take your foot off the gas, then reapply it, it will sometimes hesitate. Also the downshifting could be quite rough. Mine was in twice already for programming. The first time it seemed okay for 3 days, then got much worse. The second time in...well I just got it back. Seems okay, but I cannot tell yet since I have to wait a week or two.
Dont jump to conclusions on this after you get your service software update done. It takes a few hundred miles to adapt. I already had it hesitate twice. I will let you know. I have my doubts. If it gets bad again, then I will definitely be looking into Lemon Law rights before the third service attempt. :lemon:
I hope this is fixed!
For more of the same topic on hesitation you might want to go to www.bimmerfest.com and take a look at their x3 forum!
The results this time? Seemed great for 150 miles, then it started again. Today I went to make a left turn when the light turned green. It hesitated so bad that I actually thought that the engine stalled! Not impressive! Where is the REAL fix BMW??? Will it be out before I take my car back under the lemon law? Too bad, because aside from this, when in rare times it does work, it is actually a joy to drive.
Today-another near miss. While turning left into Home Depot, it actually went forward briefly, then hesitated right in the middle of the intersection. I had to floor it to avoid other cars from hopefully just slowing down to avoid a collission.
Weird thing is that it seemed really good just after the second service, then after 150 miles, and now 250 miles later it is getting progressively worse again. SD mode is out of the question-that is so jerky and uncomfortable-what a joke. I hope nobody gets in an accident with this. I only pull out when there is absolutely no traffic-its like russian roullette if you dont. :lemon: :sick:
I guess I will wait awhile until they get another software update-(or if they do). I think twice before pulling out in traffic, and that sucks, because this is a BMW, its expensive, and it is SUPPOSED to work properly every time! :lemon: :lemon:
As for the Bluetooth phone, if you have a PDA that has your entire address book, you will be clicking forever to find a name in the middle of your directory. It only displays ~10 numbers at a time, and there is no way to jump to a letter, so you have to page through the entire directory 10 numbers at a time (if you have work, home and cell numbers for folks, that counts as three). Oh...if the person you are trying to call is not home and you want to now call their cell phone, you have to start ALL OVER AGAIN. ARGH
Also, do NOT buy the iPod adapter! It is worthless. Your entire ipod directory is displayed as “TRK 1”, TRK 2”, etc. You have no idea who the artist is or the song title. I have not used it since the day I had it installed.
But the main issue is the transmission. I am beyond frustrated because each time I take it in, the service folks tell me the transmission checks out “normal” on their computers. I am convinced that this jerky transmission and high RPMs is the reason I get horrible gas mileage on this vehicle. I am averaging around 14.5mpg in the city and 17.5 on the highway. Now, before you accuse my driving habits for this, I do *not* have a lead foot, this is not my first BMW, and yes, I *always* put 93 octane in the car. I too have had many many passengers in my car make comments on how bad this thing shifts and how they think I should have bought a Lexus, etc.
Wish me luck I am about to take the car in for the 4th time in 15 months. Sigh
:lemon: :lemon:
BMW has a bunch of advanced technologies which anticipate when you are about to brake. For example, if you ease of the gas pressure to apply the brake, it pre-tightens some of the mechanical stuff to reduce braking time and distance. Similarly of the rain sensitive wipers detect rain, it starts drying out the brakes.
To improve mileage, it also will try to anticipate when you are trying to brake/stop and reduce fuel flow. During a turn many drivers tend to reduce the pressure on the gas pedal. This is not a conscious decision but happens with everyone. If you are taking off from a stop, and turning, and reduce the pressure on the gas pedal, the car might be anticipating that you are about to brake. The electronic throttle might be reducing the gas flow, in anticipation of the brake. So try and keep constant pressure on the gas pedal during turns.
Ideally, you are supposed to hit the gas when hit the apex of the turn. I guess BMW is tuned towards that and if you ease on the gas, it anticipates that you are going to stop.
BTW, this car is mean to be driven in the steptronic manual mode. Lots of fun!!
Good luck with your X3s folk. I am having a blast in mine.
I am with you miniok. Why should millions of people learn to drive differently because BMW cant program their cars correctly? That theory is blown!
Well here is my conclusion after the second service and 1200 miles later:
I have my X3 for just over 2 months now. It was in for tranny software updates twice. The first did nothing. The second actually helped the hesitation, erratic downshifting, and a host of other issues a great deal....BUT...it still hesitates, and stumbles intermittently while turning or going straight. And it happens at the most unsafe time-when crossing traffic or pulling out. I have to wait until traffic is totally clear (like an 80 year old granny would), before proceeding, or it will choke when I pull out. I had to slam it in reverse to clear oncoming cars, and have had horn blows from angry drivers. Not as often as before, but it still happens a few times a week, if not once a day.
This is unsafe, and is not acceptable to me. I want it fixed, or a new car, or my money back!
Too bad, because when it works, it is a real nice ride.
I REALLY REGRET BUYING THIS VEHICLE! IT IS A PAIN IN THE BUTT TO TAKE IT IN CONSTANTLY-THATS WHY I GOT RID OF MY OLD CAR AND BOUGHT THIS ONE! UGHHHHH!!!!! I actually talked to a rep where I bought it, and he told me that there was nothing wrong with the car, but BMW would reprogram it for me to suit my driving. Isnt that a crock of BS!!! By the way, I could not get a word in edgewise with this guy. Well here goes my adventure with service visit number THREE!!
btw, we do have a BMW rep visit the forum occasionally (bmwna).
If there's another dealer anywhere close you could try stopping in for another opinion. And you can file a complaint with the NHTSA about the hesitation.
I know there are knowledgeable people on here. I happen to be one of them!